Self-locking hinge.



F. H. ROBINSON.

SELF LOCKING HINGE.

APPLICATION FILED APR. 1. 1915.

1,151,397. Patented Aug. 24, 1915.

WITNESSES "VI/EN T09 Frank HR binson A "ORA/E78 COLUMBIA PLANDDIAPH CD"WASHINm 7- C.

FRANCIS HOWARD ROBINSON, OF FORT WILLIAM, ONTARIO, CANADA.

SELF-LOCKING .HINGE.

Specification of Letters Patent.

Patented Aug. 24, 1915.

Application filed April 1, 1915. SerialNo. 18,626.

To all whom it may concern Be it known that I, FRANCIS H. ROBINSON, acitizen of the Dominion of Canada, and a resident of Fort WVilliam, inthe District of Thunder Bay, Province of Ontario, Canada, have inventeda new and Improved Self-Locking Hinge, of which the following is a full,clear, and exact description.

This invention relates to hinges and to an automatic or self-lockinghinge, and has for an object to provide an improved construction wherebya door may be held by the hinge in an open or partially open position.

Another object in view is to provide a hinge in which locking membersare provided designed to be readily thrown into and out of operation inorder to hold the door in an open position.

In the accompanying drawings :Figure 1 is a side elevation of a hingeembodying the invention, the same being partially closed; Fig. 2 issimilar to Fig. 1 with certain parts broken away; Fig. 3 is a sectionthrough Fig. 2 on line 33; Fig. 4: is a section through Fig. 1 on line4.4=.

Referring to the accompanying drawings by numeral, 1 indicates a wall orsupport and 2 a door to which the leaves 3 and a, respectively, aresecured. In Fig. 3 the hinge is shown in use as a butt hinge, though itis evident that the hinge could be used as a T-hinge without departingfrom the spirit of the invention. The leaves 3 and 4.- are provided withbarrels 5 and 6 which interlook so that the pintle pin 7 may be passedtherethrough for connecting the leaves together. Connected with the leaf3 are quadrants or looking bars 8 and 9. It is evident that one or morethan 2 locking bars could be used without departing from the sprit ofthe invention. The locking bars are each provided with notches orreduced portions 10 and 11. The bars 8 and 9 are preferably rigidlysecured to the leaf 3 but are adapted to freely pass through aperturesin the leaf 4.

A sliding or looking plate 12 is connected with the leaf 4 by means of apin 13, which be in the nature of a thumb screw and which operates inslot 14, whereby plate 12 may be locked in operative or inoperativeposition. Plate 12 is provided with apertures 15 and 16 through whichthe bars 8 and 9 freely pass when the plate is in the position shown inFig. 1. lVhen plate 12 is lowered to the position shown in Fig. 2 theslots 17 and 18 accommodate the reduced portion 11 or the reducedportion 10, as the case may be, and thereby lock leaf & and door 2secured thereto against further movement. It is evident that more thantwo reduced portions may be provided without departing from the spiritof the invention. When door 2 is closed the plate 12 is, of course, inits elevated position, as shown in Fig. 1, and the locking bars 8 and 9are extended into suitable slots 19 formed in door 2, there being a slot19 for each of the locking bars.

By forming the hinge with looking bars and a sliding locking plate asabove set forth, means are presented which will firmlyv hold the door inany desired position without the use of stops or other means acting onthe door. Heretofore when an ordinary hinge has, been used it isnecessary to use a chair, prop or some movable object in order toprevent the door from closing under the action of air pressure or anyaccidental movement given the door. The hinge above described presentsmeans which will automatically hold the door in any position desiredafter the parts have been properly adjusted. In order to limit theopening of the door a head or enlargement 20 may be arranged on theouter end of the various locking bars.

Having thus described my invention, I claim 1. In a hinge of thecharacter described, a locking bar extending from one leaf to the other,said locking bar being formed with a plurality of notches, said bar alsobeing fixed to one of the leaves and arranged to extend through anaperture in the other of said leaves, a sliding locking plate arrangedto fit in one of said notches according to the adjustment of the leavesso as to lock the leaves against movement, and means for locking theplate against movement after the same has been adjusted.

2. In a hinge of the character described, a leaf, a plurality of lockingbars connected with said leaf, each of said locking bars being formedwith a plurality of notches and reduced portions, a second leaf, meansfor pivotally connecting said second leaf with said first mentionedleaf, said second leaf having apertures through which said bars maypass, a locking plate arranged on said second leaf, said locking platebeing provided with an aperture having a reduced slot for each of saidlocking bars, whereby the locking bar may freely pass through the nameto this specification in the presence of locking plate When the plateisin one posi two subscribing Witnesses.

tion and held against movement When the reduced extensions fit'into saidnotches, and FRANCIS HONARD ROBINSON a combined guiding and retainingmember Witnesses:

clamplng. said locking plate 1n p0s1t10n.. LL HULAND,

In testimony whereof I have signed my E. C. LAW.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner cu; Petents. Washington, D. C. y e v

